export type SemVer = {
    major: number;
    minor: number;
    micro: number;
};
export declare function parseSemVer(s?: string): SemVer;
export declare function compare(a: SemVer, b: SemVer): number;
export declare const Feature: {
    readonly JS_KV: "js_kv";
    readonly JS_OBJECTSTORE: "js_objectstore";
    readonly JS_PULL_MAX_BYTES: "js_pull_max_bytes";
    readonly JS_NEW_CONSUMER_CREATE_API: "js_new_consumer_create";
    readonly JS_ALLOW_DIRECT: "js_allow_direct";
    readonly JS_MULTIPLE_CONSUMER_FILTER: "js_multiple_consumer_filter";
    readonly JS_SIMPLIFICATION: "js_simplification";
    readonly JS_STREAM_CONSUMER_METADATA: "js_stream_consumer_metadata";
    readonly JS_CONSUMER_FILTER_SUBJECTS: "js_consumer_filter_subjects";
    readonly JS_STREAM_FIRST_SEQ: "js_stream_first_seq";
    readonly JS_STREAM_SUBJECT_TRANSFORM: "js_stream_subject_transform";
    readonly JS_STREAM_SOURCE_SUBJECT_TRANSFORM: "js_stream_source_subject_transform";
    readonly JS_STREAM_COMPRESSION: "js_stream_compression";
    readonly JS_DEFAULT_CONSUMER_LIMITS: "js_default_consumer_limits";
    readonly JS_BATCH_DIRECT_GET: "js_batch_direct_get";
    readonly JS_PRIORITY_GROUPS: "js_priority_groups";
};
export type Feature = typeof Feature[keyof typeof Feature];
type FeatureVersion = {
    ok: boolean;
    min: string;
};
export declare class Features {
    server: SemVer;
    features: Map<string, FeatureVersion>;
    disabled: string[];
    constructor(v: SemVer);
    /**
     * Removes all disabled entries
     */
    resetDisabled(): void;
    /**
     * Disables a particular feature.
     * @param f
     */
    disable(f: Feature): void;
    isDisabled(f: Feature): boolean;
    update(v: SemVer | string): void;
    /**
     * Register a feature that requires a particular server version.
     * @param f
     * @param requires
     */
    set(f: Feature, requires: string): void;
    /**
     * Returns whether the feature is available and the min server
     * version that supports it.
     * @param f
     */
    get(f: Feature): FeatureVersion;
    /**
     * Returns true if the feature is supported
     * @param f
     */
    supports(f: Feature): boolean;
    /**
     * Returns true if the server is at least the specified version
     * @param v
     */
    require(v: SemVer | string): boolean;
}
export {};